Method of simultaneously determining gauge and orientation of polymer films
US4631408A · kind A · utility
14Cited by
8References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1984 |
| Grant date | Dec 23, 1986 |
| Priority date | — |
| Expiry date | Sep 24, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/869
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In the manufacture of a multilayer polymer film, the thickness and degree of orientation are simultaneously measured. A beam of infrared radiation having predetermined wavelengths is either transmitted through or reflected by the polymer film to be measured and received by a photodetector. The photodetector provides an electrical output signal which can be analyzed to determine the thickness and degree of orientation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.